spliiting of the values

my data is storing in the data base in the formate of customer number :"F123"  i have serch filter when i search with F123 it is returing the related data but now if i search with customer number with padding (0) like "F000123" it shoud return the data whic have returen for "F123",

the customer number is passing to stored proc and getting the out put so my queery is before sending input to the stored proc i need to remove the padded values then need to send to stored proc please me with solution 

so how can i remove the padded (0) from the value where i am searching

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